fix typos
diff --git a/c_gen/c_type_maps.py b/c_gen/c_type_maps.py
index 84fba41..e5c36fc 100644
--- a/c_gen/c_type_maps.py
+++ b/c_gen/c_type_maps.py
@@ -1079,12 +1079,12 @@
             case OF_BSN_PORT_COUNTER_STATS_REQUEST:
             case OF_BSN_PORT_COUNTER_STATS_REPLY:
                 of_message_stats_experimenter_id_set(msg, OF_EXPERIMENTER_ID_BSN);
-                of_message_stats_experimenter_subtype_set(msg, 7);
+                of_message_stats_experimenter_subtype_set(msg, 8);
                 break;
             case OF_BSN_VLAN_COUNTER_STATS_REQUEST:
             case OF_BSN_VLAN_COUNTER_STATS_REPLY:
                 of_message_stats_experimenter_id_set(msg, OF_EXPERIMENTER_ID_BSN);
-                of_message_stats_experimenter_subtype_set(msg, 8);
+                of_message_stats_experimenter_subtype_set(msg, 9);
                 break;
             default:
                 break;